* arch/arm64/src/common/arm64_signal_dispatch.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <arch/syscall.h>
#include "arm64_internal.h"
#ifdef __KERNEL__
* Public Functions
****************************************************************************/
* Name: up_signal_dispatch
*
* Description:
* In the kernel mode build, this function will be called to execute a
* a signal handler in user-space. When the signal is delivered, a
* kernel-mode stub will first run to perform some housekeeping functions.
* This kernel-mode stub will then be called transfer control to the user
* mode signal handler by calling this function.
*
* Normally the user-mode signaling handling stub will also execute
* before the ultimate signal handler is called. See
* arch/arm64/src/common/arm64_signal_handler.S. This function is the
* user-space, signal handler trampoline function. It is called from
* up_signal_dispatch() in user-mode.
*
* Input Parameters:
* sighand - The address user-space signal handling function
* signo, info, and ucontext - Standard arguments to be passed to the
* signal handling function.
*
* Returned Value:
* None. This function does not return in the normal sense. It returns
* via an architecture specific system call made by up_signal_handler().
* However, this will look like a normal return by the caller of
* up_signal_dispatch.
*
****************************************************************************/
void up_signal_dispatch(_sa_sigaction_t sighand, int signo,
siginfo_t *info, void *ucontext)
{
sys_call4(SYS_signal_handler, (uintptr_t)sighand, (uintptr_t)signo,
(uintptr_t)info, (uintptr_t)ucontext);
}
#endif